Roham Tahmaseb Zamanian, MD

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

• Stanford Health Care Hospital · Stanford, CA

Colleagues at Stanford Health Care

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3085 clinicians in the practice; 12 are shown here.

• Preetha Basaviah, MD Internal Medicine Physician · Stanford, CA
• Michael Ie Chen, MD Anesthesiology Physician · Palo Alto, CA
• Tamara Jones Dunn, MD Internal Medicine Physician · Palo Alto, CA
• Kirsti Ilona Weng Elder, MD Geriatric Medicine (Internal Medicine) Physician · Palo Alto, CA
• Lori Renee Guelman, NP Adult Health Nurse Practitioner · Stanford, CA
• Dr. John Joseph Jernick, MD Family Medicine Physician · Stanford, CA
• Vivekanand Kulkarni, MD Anesthesiology Physician · Stanford, CA
• Paul Duncan McGeoch, MD Neurological Surgery Physician · Stanford, CA
• Rebecca Smith-Coggins, MD Personal Emergency Response Attendant · Stanford, CA
• Winifred Gresens Teuteberg, MD Internal Medicine Physician · Stanford, CA
• Alan Eih Chih Thong, MD Surgery Physician · Stanford, CA
• Volney Ford Vandalsem III, MD Body Imaging Physician · Stanford, CA

Other providers in Stanford

• Pahnwat Tonya Taweesedt, MD

  Individual Pulmonary Disease Physician · NPI 1093255432

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Jonika M Weerasekare

  Individual Pulmonary Disease Physician · NPI 1598460370

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 498-9000

• Ann Berrier Weinacker, MD

  Individual Pulmonary Disease Physician · NPI 1942310016

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Jennifer Williams, MD

  Individual Pulmonary Disease Physician · NPI 1396007100

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000